A Novel Approach to Improving Power System Oscillations Damping Based on Incorporating FACTS with Superconducting Magnetic Energy Storage

MOLINA, MARCELO GUSTAVO; MERCADO, PEDRO ENRIQUE

Puerto de Iguazú, Argentina

Congreso; XIII Encuentro Regional Iberoamericano de CIGRÉ (ERIAC); 2009

International Council on Large Electric Systems (CIGRÉ )

In the last decade, many large blackouts happened worldwide that led to serious economic losses. This allows concluding that the ability of current primary frequency control (PFC) to meet an emergency is poor, and security of power system (PS) should be improved. An alternative to accomplish this improvement is to store exceeding energy during off-peak load periods in efficient energy storage systems for substituting the primary control reserve. In this sense, superconducting magnetic energy storage (SMES) in combination with flexible AC transmission systems (FACTS) are capable of supplying power systems with both active and reactive powers simultaneously and very fast, so that the systems security can be dramatically enhanced. This paper presents a new concept of PFC based on incorporating a Static Synchronous Compensator (STATCOM) coupled with SMES. A full detailed model of the integrated STATCOM-SMES controller is proposed and a new three-level control scheme is designed, comprising an enhanced frequency control scheme, a full control strategy in the synchronous-rotating d-q reference frame with a novel controller to prevent DC bus capacitors voltage drift/imbalance.  The dynamic performance of the proposed control schemes is fully validated by digital simulation carried out by using SimPowerSystems of MATLAB/Simulink.